Anus internal muscle sphincter


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The internal anal sphincter, IAS, (or sphincter ani internus) is a muscular ring that surrounds about – cm of the anal canal; its inferior border is in contact with, but quite separate from, the external anal sphincter.

It is about 5 mm thick, and is formed by an aggregation of the involuntary circular fibers of the rectum.

best of Muscle sphincter internal Anus
Anus internal muscle sphincter
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best of Muscle sphincter internal Anus

The external anal sphincter (or sphincter ani externus) is a flat plane of muscular fibers, cm opposite the anus, when defecation occurs the sphincter muscle retracts. Its fibers surround the canal, closely applied to the internal anal sphincter, and in front blend with the other muscles at the central point of the perineum.

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Description:Anal Stenosis Anal Stricture What is anal stenosis? When a tubular organ or blood vessel becomes excessively narrow such that it can no longer perform as nature intended, it is a condition referred to by physicians as stenosis. Anal stenosis, also known as an anal stricture, is the narrowing of the anal canal, located just before the anal sphincter. What is the anal sphincter?

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Views: 2162 Date: 2018-07-25 Favorited: 61 favorites

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